Coal-excavator



V(No'Model.)

H. WILVERTH.

GOAL EXGAVATOR. No. 252,565. n Patented Jan.1'7,1882.

INVBNTOR ATTORNEYS.

UNITED ISTATES PATENT OFFICE.

HENRY VILVERTH, OF ST. CHARLES, KENTUCKY.

COA L-EXCAVATO R.

SPECIFICATION forming part of Letters Patent No. 252,565, dated January 1'7, 1882.

Application filed June 2Q. 1881.. (No model.)

. To all whom it may concern:

Be it known that I, H'nvnv` WILVERTH, of St. Charles, in the county of Hopkins and State of Kentucky, have invented a new and Improved Coal-Excavator, of which the following is a full, clear, and exact description.

This invention relates to that class of excavators in which a rod of iron with a pick projecting in line from its end is used, and its object is to enable the operator tov make a long and deep trench.

The invention consists of a peripherallygrooved wheeljournaled in aswiveled trunnionbed or pillow-block and supportingin its groove the excavating rod and piek, and it further consists ofan adjustable weightseeuredon one end of said rod to counterbalance the Weight of the pick on the opposite end, all of which will be hereinafter set forth.

Figure lis a side elevation of the device. Fig. 2 is an enlarged vertical section of the saine online x,Fig. 1. Fig. 3 isa plan ofthe same. Fig. 4 represents views of another style of pick that is used with the device.

Similar letters of refereneeindicate corre sponding parts.

In the accompanying drawings, A represents a portable bed-plate, I )referably of wood, provided with spikes a on its underside to secure it in any desired position. Secured on either face of the bod plate A by bolts and nuts b Z1 is a centrally-perforated metal plate, B, to increase the strength and durability thereof'.

C represents the trunnion-bed or pillowb lock, supported in an upright position by the entrance of its spindle c into and through the center of the plates A B B, and affording bearings for the trnunions on the shaft Dl of the grooved wheel D, that is designed to revolve in a vertical plane and support the rod or bar E that carries the pick F.

A piu, m, is passed at right angles through the spindle c, beneath the upper plate, B, to hold the trunnion-block C in place, and a eircular excavation, c', is made in the bed-plate A, to afford room for the pin m 'when the block C is revolved. This rod or barE has on one end an enlarged socket, G, in which a pick, F, is secured by a key, d, and on its other end a sliding adjustable weight, H, is secured by a set-screw, j', which weight H is designed to eounterbalance the weight of the pick F, so that the latter and its rod E shall be kept in suitable position when in operation. The

device is operated by giving reciprocating' longitudinal motion to rod and pick E F, and

being supported on the grooved swiveled wheel D, they can be moved back and forth with but little labor, and can be swung in horizontal and vertical planes to excavate long and deep trenches in the coal or other material to be operated upon; and the bedplate A can be secured at any desired inclination, so that the pick F can be made to operate to form trenches at any required angles, therein possessing great advantages over those coal-excavators not having swiveled rolling supports for their picks and rods.

The pick that is most effective for ordinary coal-excavation has a double-chisel-pointed cutting end, as shown in Fig. 1 g but the pick shown in Fig. 4t or any other convenient form may be used with this device.

I am aware that it is not entirely-new to support ar reciprocating mining-tool upon grooved wheels, and therefore do not broadly claim a carriage of such construction.

Having thus described my invention. what I claim, and desire to secureby Letters Patent,

1. In Local-excavator, the coirbination, with the rod and pick E F, of the swiveled block C and the supported grooved wheel D, substantially as herein shown and described, whereby said rod and pick are supported and easily operated to excavate long and deep trenches in any direction, as set forth.

2. In a coal-excavator, the oombination,with

the pick-rod E andpick F, supported on the' fulcrum-wheelD, ofthe counter-balance H, substantially as and for the purposes described.

3. In a coal-excavator, the oombination,with the bed-plate A, provided'with face-plates B, of the trunnion-bed or pillow-block C, 'provided with a spindle, c, substantially as herein shown, and for the purpose described.

4. In acoal-excavator, the oombination,with the swiveled pillow-block C, of the grooved wheel D, substantially as herein shown and described.

5. In a coal-excavator, the oombination,with the rod and pick, of a vertically and horizontally revolving support, substantially as herein shown and described, whereby any desired direction may be given to the pick, as set forth.

HENRY WILVERTH.

Witnesses:

MANNING M. KIMMEL, JAS. R. RAsH. 

